<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
<div id="app">
    <!-- 1. 直接拼接 -->
    <h2>{{firstName + ' ' + lastName}}</h2>
    <!-- 2. 利用方法拼接 -->
    <h2>{{getFullName()}}</h2>
    <h2>{{getFullName()}}</h2>
    <h2>{{getFullName()}}</h2>
    <h2>{{getFullName()}}</h2>
    <h2>{{getFullName()}}</h2>
    <!-- 3. 利用计算属性拼接 -->
    <h2>{{fullName}}</h2>
    <h2>{{fullName}}</h2>
    <h2>{{fullName}}</h2>
    <h2>{{fullName}}</h2>
    <h2>{{fullName}}</h2>
</div>

<script src="../js/vue.js"></script>
<script>
    const app = new Vue({
        el: '#app',
        data: {
            message: 'Hello Vue!',
            firstName: 'Kobe',
            lastName: 'Bryant'
        },
        computed: {
            fullName: function(){
                console.log('fullName');
                return this.firstName + ' ' + this.lastName;
            }
        },
        methods: {
            getFullName: function(){
                console.log('getFullName');
                return this.firstName + ' ' + this.lastName;
            }
        },
    })
</script>
</body>
</html>